Carbon fiber filter and regeneration method therefor, and water treatment device

Abstract

A carbon fiber filter includes a center filter body and carbon fiber yarn wound around the center filter body. The center filter body is hollow and includes a water outlet. A surface of the center filter body is provided with at least one inverted triangular groove. A plurality of through holes are arranged in the groove. The through holes and the water outlet are in communication with a hollow inner cavity of the center filter body. The carbon fiber yarn is wound in the groove with a constant force to form a filter layer.

What is claimed is: 
     
         1 . A carbon fiber filter, comprising a center filter body and a carbon fiber yarn wound around the center filter body, wherein the center filter body is hollow and comprises a water outlet, a surface of the center filter body is provided with at least one groove, a plurality of through holes are arranged in the groove, the through holes and the water outlet are in communication with a hollow inner cavity of the center filter body, and the carbon fiber yarn is wound in the groove with a constant force to form a filter layer, wherein the groove is an inverted triangular groove with a lowermost angle of 10° to 160°. 
     
     
         2 . The carbon fiber filter of  claim 1 , wherein the carbon fiber yarn is wound in the groove with a constant force of 10 N to 200 N. 
     
     
         3 . The carbon fiber filter of  claim 1 , wherein the carbon fiber yarn is a modified carbon fiber yarn obtained through acid leaching. 
     
     
         4 . The carbon fiber filter of  claim 1 , wherein the carbon fiber yarn is modified carbon fiber yarn obtained through ablation at a high temperature of 200° C. to 700° C. 
     
     
         5 . The carbon fiber filter of  claim 1 , wherein the center filter body and the carbon fiber yarn wound around the center filter body are used as a cathode connected to a negative electrode of a power supply, to form an electroflocculation-fiber filtration water treatment device with an iron anode connected to a positive electrode of the power supply. 
     
     
         6 . A regeneration method for the carbon fiber filter of  claim 1 , comprising: placing the carbon fiber yarn as a cathode in an electrolyte for backwashing without the constant force, performing water electrolysis after the carbon fiber yarn communicates with an anode, to generate a large quantity of microbubbles at the cathode, and washing a surface of the carbon fiber yarn for regeneration by using backwash water and the microbubbles. 
     
     
         7 . The method of  claim 6 , comprising: placing the carbon fiber yarn as the cathode in the electrolyte after removing the constant force on the carbon fiber yarn. 
     
     
         8 . The method of  claim 6 , wherein a voltage of 1.2 to 8 V is applied between the cathode and the anode in the water electrolysis. 
     
     
         9 . An electroflocculation-fiber filtration water treatment device, comprising an anode and a cathode, wherein the anode is electrically connected to a positive electrode of a power supply, the cathode is electrically connected to a negative electrode of the power supply, and the cathode is a cathode of the carbon fiber filter of  claim 1 . 
     
     
         10 . The device of  claim 9 , wherein the anode is an electroflocculation anode plate located upstream of a water flow direction and comprises one or more of iron, aluminum, an aluminum-containing composite material, and an iron-containing composite material.